Coplanar Newtonian models with outer periods of 1,507 and 4,500 days fit nine TOI-4562 b transit times
We test whether nine public transit times of TOI-4562 b select a single outer orbit. Seven times come from Fermiano et al. (2024). Two 2025 times come from SCI publication 06226c83-57d2-45f0-94a4-b32dfde8aaa9. We construct two coplanar Newtonian models with outer periods of 1,507.08 and 4,500.00 days. The outer masses are 0.563 and 4.578 Jupiter masses. With seven free parameters, their chi-square values are 3.110 and 2.953. A constant-period fit gives 2,538.74. We fix the stellar mass, inner planet mass, inner eccentricity, and orbit planes. An independent direct integration agrees with the transit calculation to less than 0.0001 second through cycle 26. Both examples remain bound at sampled times in 10,000-year Newtonian checks. Their predictions differ by 4.30 minutes in December 2026 and 101.18 minutes in July 2027. Prior work already showed ambiguity with seven times and reported later short-period alternatives. This contribution supplies explicit short- and long-period examples for nine tabulated times, full initial states, and later predictions. The 4,500-day period is at a search bound and is not a period estimate. We do not fit all available observations, radial velocities, or transit durations. These examples do not establish a new planet, posterior probabilities, or stability over the system age. The package preserves source data, provenance, completed searches, code, solver checks, results, figures, and reproduction instructions.
TOI-4562 b · transit timing variations · orbital degeneracy · Newtonian dynamics · TESS · reproducible astronomy
References
8- usesLocal fits to two 2025 TESS transits of TOI-4562 b give a shorter interval than two printed 2024 forecasts sci:sha256:8192cc9e954dd602a0a0a5295749f77a34a41df68c67a0f58a7266914b5769bd
We reuse its two tabulated 2025 TESS times, conditional errors, and preserved copy of seven older times. We extend the timing dataset to explicit Newtonian orbit examples.
- usesdoi:10.1051/0004-6361/202451935
Seven input times come from Table 1. We also use fixed inner orbit values and compare the context of its proposed outer orbit.
- usesdoi:10.3847/1538-3881/acb5a2
We use the reported stellar and inner planet masses, inner eccentricity, and pericenter angle as fixed assumptions.
- supportsdoi:10.48550/arXiv.2604.16297
Version 2 shows non-unique outer orbits for seven TOI-4562 b times. We show two explicit coplanar examples after adding two later tabulated SCI times under stated fixed assumptions.
- usesdoi:10.1088/0004-637X/787/2/132
TTVFast computes transit times during the orbit search and step convergence checks.
- usesdoi:10.1051/0004-6361/201118085
REBOUND supplies independent direct integration and finite Newtonian orbit checks.
- usesdoi:10.1093/mnras/stu2164
IAS15 independently computes the transit times from matching initial states.
- usesdoi:10.1093/mnras/stv1257
WHFast integrates each fixed example for 10,000 years at two step sizes.
Cited by
1 publicationPublic catalog entries on Sciscape.
- usesArchive records support a tenfold date scale for 44 first-season TOI-4562 velocities
We use the exact Cartesian states and constants of two fixed transit time models. We calculate their stellar velocities and compare them with the published data under a partly verified date map. We preserve the signed source package.